[sdiy] knob spacing

[Simon Brouwer]

Hi all,

The knobs I'm planning to use for my diy synthesizer are 12 mm in 
diameter 
(http://nl.farnell.com/multicomp/cr-ms-5/knob-soft-touch-spline-shaft/dp/1440013).
I want to fit as many knobs on my panel as possible.
What do you guys think would be the minimum spacing for feasible operation?

-- 
Vriendelijke groet, 
Simon Brouwer. 

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